Costco initiated with an Outperform at Evercore ISI. Evercore ISI analyst Greg Melich started Costco with an Outperform rating and $260 base case price target. While Costco "faces the Amazon wall of worry," he believes its sticky membership model creates loyalty that can drive sales and profits for years to come.

Costco initiated with a Neutral at Nomura Instinet. Nomura Instinet analyst Simeon Siegel initiated Costco with a Neutral rating and $230 price target, saying that while Costco is "one of the most impressive names in retail," its shares reflect that and are fairly valued.

The CFO of Costco Richard Galanti disclosed in a filing that he had sold 4,188 shares of company stock at an average price of $230.47 per share between March 11 and March 12 for a total transaction value of $965,197. Additionally, Costco VP Joseph Portera sold 11,765 shares of company stock for an average price of $228.51 per share for a total transaction value of $2,688,388. Additionally, VP Timothy Rose sold 6,000 shares of company stock at an average price of $234.27 per share worth $1,405,624 on March 13.